Signments



(No Model.) 2 Sheets-Sheet 1.

F. L. BAKER.

PAPER BAG MAGHINB.

110. 484,281. Patented 001. 11, 1892.

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(No Model.) 2 Sheets-Sheet 2;

P. L. BAKER. PAPER BAG MACHINE.

No. 484,281. Patented Oct. 11, 1892.

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UNITED STATES PATENT OFFICE.

FRANK L. BAKER, OF WILMINGTON, DELAWARE, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO THE DIAMOND PAPER BAG COMPANY, OF SAME PLACE.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent N0.'484,281, dated October11 1892.

Application filed September 8, 1891. Serial No. 405,070. (No model.)

To 00% whom it may concern.-

Be it known that I, FRANK L. BAKER, a citizen of the United States,residing at Wilmington, in the county of New Castle and State ofDelaware, have invented certain new and useful Improvements in Paper-BagMachines, of which the following is a specification.

My invention relates to the manufacture of paper bags, and moreespecially to machines of the character shown in Patent No. 415,950,granted November 26, 1889, which are adapted to be used in themanufacture of either fiat or square bottom bags having pasted, tucked,and folded bottoms.

It has for its object to improve the construction and arrangement andmode of op- 'eration of such machines to enable them more perfectly andsatisfactorily to carry out the various operations necessary for makinga complete bag.

My invention consists in a certain construction and arrangement of partsof the machine, whereby the folding and pasting of the bagbottom may becarried out, as will be more specifically pointed out hereinafter, andfor which I made application for patent in Canada on the 18th day ofNovember, 1891, Serial No. 58,543.

Referring. to the accompanying drawings, in which I have shown thepreferred embodiment of my invention, Figure 1 is a longitudinalvertical section of the machine. Fig. 2 is a plan view of the same. Fig.3 is a detached view of the gripping-rolls and pasting devices. Fig. 4is an enlarged view of one of the rolls and the tucking-blade. Fig. 5 isa sectional view of the same.

In the accompanying drawings I have illustrated sufficient of apaper-bag machine to clearly disclose my invention, and in which 21represents the feed-rolls for feeding the tube over the usual former,and 20 a rotary cutting-knife for severing the tube into baglengths,operating in connection with the ordinary stationary knife, and 16 and17 are the folding-rollers for forming the bottom. Between thecutting-blade and the bite of the rollers is a funnel-shaped guide 14,and a folding-blade 12 is mounted in rock-arms 15 and is adapted to beoperated substantially as set forth in the patent above referred to.

Mounted on the frame of the machine is a paste-box 4, in which moves avertically-reciprocating paster 6, it being operated by the rock-arm 2,which in turn is vibrated by the arm 3, taking into the groove of a cam1, and motion is imparted to this cam through a train of gears, whichneed not herein be specifically described.

One of my improvements relates to the means of controlling the supply ofpaste from the paste-box 4 by means of the reciprocating blade 6. Thisblade is arranged parallel to the front side of the box, the lowerportion bearing on a bar 13, being held in contact therewith by a spring7. Passing through the bottom of the box is a doctor or scraper blade 9,the ends of which are prolonged so as to extend to the front at eachside of the paste-blade, and this doctor is normally under the stress ofa spring or springs 8, secured to the paste-box, so that it is held inproper position with relation to the vertically-moving paste-blade. Inorder to regulate the amount of paste delivered by the blade, I providemeans for adjusting the doctor, and in the present instance I have shownthe screwrods 5, mounted on the front side of the pasteblade and havingconical ends which bear upon the projecting fingers or extensions of thedoctor 9, and it will be seen that by adjusting these screw-rods thespace between the doctor and the operating-surface of the paste-blademay be nicely and accurately adjusted, so that the precise amount ofpaste will be delivered by the blade.

Another and important feature of my invention relates to the manner ofapplying paste to the folded end of the bag-blank, and in carrying outthis feature of my invention I provide a movable paste-bar 10, which isarranged above and practically between the rolls 16 and 17 and slides insuitable guides in the frame of the machine, being moved forward by acam or projection 11 or other 5 equivalent means, and being returned toits normal position by a spring or springs 18. This paste-bar has aninclined top surface, and as the tube is fed past the cutters and overthe roll 16 its end strikes this inclined surface of the paste-bar andrides upon it, and when it has reached the proper position the pasteblade 6 descends and the forward end of the tube is creased and the endbent up against the paste-blade to receive the paste. At the moment thepaste-blade reaches its lowermost position, or, if preferred, justbefore it reaches this position, the paste-bar is forced forward by thecam 11,so as to grasp the end of the tube between its forward surfaceand the surface of the paste-blade and to press the end of the tubefirmly against the blade. The cams are so shaped that these operationswill be properly timed, and, preferably, there will be a dwell, thepaste-blade beingheld in its lowermost position and "-the paste barclamping the end of the tube against it for? a very important feature,as the pressure of the bag-bottom against the pasteblade i-nsures aneven and smooth distribution of the paste, as well as acompleteadhe'renee of the paste to the end of the tube. Moreover, this combinedaction of thepaste-blade and pastebar performs'another importantfunction in that it firmly holds the end of -the advancing 'tubestationary u'n'til sufficient of the tube l hasbeen fed forward by thefeed-rollers to I allow the requisite slack to insure a proper severanceof the bag-lengths'from the tube by the rotating knife and withoutdanger of the bag being distorted or displacedfso th'atl'the bottom willnot be evenly made. Whenthe bag-length is severed, the foldingortucking;blade 12 is brought into operation to tuck the bottom ofthe bag-lengthinto the 'bite'of'thef' rollers 16 17, and it willbese'enthat thetuckerit blade does not have to crease the blank for; the bottom fold,as this is alreadyperformed f by the paste-blade and paste-bar(ac-operating therewith, the tucker-blade merelyl operating i to pushthe bottom into the bite of therollers. Heretofore this folding ortucker blade 1 has been "made with a straight edge, and it has requireda great nicety of adjustment of the parts 'to prevent the tucker-bladebeing} caught in the bite of the rollers, and th ereby; impeding theoperation, especially when'the machineis driven at a high rate of speed.In order to avoid this danger,-I provide the; tucker-blade 12 withcut-away portions, so as l to leave the projections 25 (best shown inFig. 4) on its tucking-edge, and these .pro-

jections may be of sufficient n-umberto prop-. e'rly insert thebag-bottom into the bite of the l rollers without danger of tearing thepaper, and as the crease has already been formed by thefolding-blade Ifind that thet-ucker blade made as described performs its functionsthoroughly and satisfactorily. As a further safeguard to .prevent anyaccidental sticking of the tucker-blade between the rollers, Icu't} awayapor'tion of the rollers, either or both,

at points corresponding with the projections 25. Thus in Figsmt and 5 Ihave shown the roller 16 as having cut-away orrecessed portions 24,corresponding with "the projection 25 on the tucker-blade, and thereby Iprevent any possibility of the tucker-blade sticking or being caught inthe bite of the rolls.

Such being the construction and arrangement of the devices, theiroperation will be fully understood and need not be set forth in detailfurther than to say that the movements of the different parts of themachine are so timed that the paste-blades preferably move downward atthe same speed the tube is fed over the roll 16 by the feed-rolls, andthe end of the tube is held between the paste-blade and paste-bar a timesufficient to allow the severance of the bag-blank from the paper tube.As soon as the paste-blade moves upward the tucker-blade operates totuck the end of the bag-blank into thebite of the-rollers.

While I have described the paste-blade as reciprocating in a verticalline and the;pastebar moving against the blade, it is evident that-I canmake the paste-bar stationary and the bladeinove against its-forwardface-and accomplish the *same results in substantially the same manner.'Otherfvariations in the details of "construction and operation ofdevices will readily suggest-themselves -to those skilledyin the art, asit is evidentthat the details of construction and arrangement set forthmay be varied without departing from the general principles of myinvention. The featuresbf invention'may be adapted to vai'ious'stylesand forms of machines other than that indicated in the drawingsand the method or steps of my process of forming the bottoms ofpaperbags be fully carried out.

What I claim is 1. In apaper-bag machine-the combination of aapaste-applier, and a -p'resser wherebythe endof the bagis creased,supplied with distributed paste and held during the slacking andseveringof the blank from the web,with ineans for completing thefold ofthe creased and .pasted end portion, substantially 'as described.

2. The combination, with the paste-blade carryingpaste o'n one of its"sides, of a pastebar between which and the paste-blade the paperis-grasped, substantially as described.

3. The combination, with the paste-bladecarnying paste on oneside, ofthe paste-bar between which bar and blade the paper is grasped, one ofthe parts'oein-g movable with respect to the other, substantially asdebe t i 4. The combination, with thereciprocating paste-bladecarrying:pafste on-one of its sides, of the movable bar adapted "topressthepaper against the -paste blade,'substantially as described. U

5, The combination, with the-feed-rolls't-he guide, and cutting-blades;ofapaste-barhavin-g an inclined-surface and a reciprocating pasteblade,the arrangement being suchth at the paper is fed over the inclinedsurfaceof the oar'and is pressed against the face fof the paste-blade,substantially as described. A

6. The combination, with the feed-rolls,

guide, and cutters, of the paste-bar, a reciprocating paste-blade, andan operative mechanism for said bar and blades, the arrangement beingsuch that the paper is grasped between the bar and blade and held whilethe baglength is being severed, substantially as described. v

7. The combination, with the rolls, of a reciprocating paste-blade, apaste-bar co-operating with the paste-blade to. grasp and crease the endof the tube and apply paste thereto, and a tucker for tucking thecreased portion into the bite of the roller, substantially as described.

8. The combination, with the rolls having recesses 24, of atucking-blade having projections corresponding with said recesses,substantially as described.

- screw-rods having conioal ends, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

w FRANK L. BAKER. Witnesses:

THOMAS REARDON,

J NO. J. SATTERTHWAIT.

